Metal forming

Metal rolling and curving

We roll and curve sheet, tube and profile to produce parts with radii, cylinders or special geometry as the project requires.

Sheet · Tube · Profile

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What is rolling and curving?

Rolling curves the material progressively until it reaches the radius or cylinder the drawing calls for. Unlike bending, which creates a defined edge at one point, here the curvature is distributed along the part.

It covers the geometry that bends cannot produce: shells, cylindrical enclosures, arcs, wide radii and curves in tube or profile. It is often the step before welding, when the curved part has to close on itself or join the rest of the assembly.

We work with sheet as well as tube and profile, depending on what the part requires.

Materials and thicknesses for rolling and curving

Metals and sheet thicknesses we work with as standard. If your industrial project needs a material that is not in the table, say so in your enquiry and our engineering office will confirm whether we can handle it.

This service works with the same materials and thicknesses as the rest of the plant. The full table is on the Sheet metal laser cutting page.

CAD file formats accepted for quoting

  • DXF
  • DWG
  • STEP / STP
  • PDF
  • STL
  • IGS / IGES
  • PNG
  • JPG

With DXF, DWG or STEP we work straight from your file geometry: no need to redraw the part, and the quote comes back sooner.

We do more than check the drawing: we advise you on nesting (how the sheet is used) so you get the lowest possible price per part before anything is cut.

How our engineering office works

If you would rather not fill in the form, send the drawing straight to cata@catagermans.com.

Confidential handling. Your drawings are only used to prepare the technical assessment and are not shared with third parties. If you need a signed non-disclosure agreement, send it over.

Technical capabilities for rolling and curving

Technical capabilities for rolling and curving
Materials formed Sheet, tube and profile
Geometry Radii, cylinders, shells, arcs and curves to drawing
Integration Combines with laser cutting and welding in the same plant

Applications and types of custom metal parts

  • Shells and cylindrical enclosures in sheet.
  • Arcs and curves in tube or profile for structures.
  • Parts with wide radii that cannot be produced by bending.
  • Assemblies that are rolled and then welded closed.

Sectors we manufacture for

We manufacture for industrial companies across very different sectors. These are some of the most common ones, but not the only ones: if yours is not listed, tell us about the part and we will confirm whether we can make it.

  • Automotive
  • Food industry (stainless steel)
  • Agricultural machinery
  • Construction
  • Steel structures
  • Energy
  • Street furniture

Why work with Catà Germans

Every process under one roof
Cutting, forming, machining, welding and finishing in the same plant. We handle the whole logistics side so you receive the parts palletised and protected at your own factory, anywhere in Catalonia and the surrounding area, on the agreed lead time.
In-house engineering office
We review the drawing before manufacturing and prepare production from CAD/CAM. If something does not add up, we ask you instead of interpreting it ourselves. And if what you have is a sketch or a question, we will help with that too: advice is part of the service.
From drawing to finished product
Some finishes, such as painting or zinc plating, are done with specialist workshops. We handle the coordination and deliver with our own fleet: a single order and a part ready to fit.
Raw material in stock
We keep sheet and tube permanently in stock, so many standard jobs can start without waiting for material.
Over 65 years of the trade
A family business founded in 1958, specialised in industrial subcontracting of metal parts. You deal directly with the people who make the part.

All metal manufacturing services

Frequently asked questions

01Rolling and curving

What is sheet metal rolling?

It is the process that curves the material progressively until it reaches the radius or cylinder on the drawing. We work with sheet, tube and profile, depending on what the part needs.

How is it different from bending?

Bending creates a sharp edge at one point; rolling spreads the curvature along the part. That is why it solves geometries that cannot be achieved with bends.

What geometries can be made?

  • Shell courses and cylindrical sheet enclosures
  • Arcs and curves in tube or profile for structures
  • Wide radii that cannot be achieved by bending
  • Assemblies that are rolled and then welded to close the shape

02Materials and limits

Which materials can be rolled?

Sheet, tube and profile, usually in carbon steel and stainless steel, depending on the mechanical or environmental demands of each application.

What is the minimum radius you can achieve?

It depends on the material, the thickness and the section. Send us the drawing and we will confirm feasibility along with the quote.

Can you bend tube without flattening it?

How a tube behaves when bent depends on the diameter, the wall thickness and the radius required. We assess it case by case from the drawing before committing to a result.

03Large assemblies and welding

Do you also weld the shell closed?

Yes. Rolling and welding are done in the same plant, so you can receive the part already closed and inspected.

Can you make large cylindrical structures?

Yes, by joining several rolled shell courses. For example, we have made a cylindrical structure over 3 metres tall from several rolled and welded steel sheets, welded both outside and inside the cylinder.

How is precision guaranteed on a large part?

Through assembly jigs, dimensional checks throughout the process and final inspection before delivery. Aligning the shell courses and holding the cylindrical geometry are the key points.

Can other processes be combined in the same part?

Yes. A single structure can bring together laser cutting, punching, rolling, bending, welding and machining, and also add openings, access hatches, flanges or reinforcements.

04Applications

Which sectors do you make rolled parts for?

Rolled sheet structures are used in very different fields:

  • Water treatment and filtration
  • Chemical industry and process equipment
  • Special machinery
  • Energy
  • Large tanks, housings and ducting

We make prototypes as well as short runs and repeat production.

05Engineering office and confidentiality

Does my file need redrawing to quote for rolling and curving?

No. With DXF, DWG or STEP we work directly on the geometry in your file: the part does not need redrawing and the quote comes back sooner. We work mainly with SolidWorks and AutoCAD, among other CAD and CAM tools.

Are my drawings treated confidentially?

Yes. Drawings are used only to prepare the technical assessment and are not shared with third parties. If you need a signed confidentiality agreement, you can send it to us.

What if I only have a sketch or a technical question?

Send us a dimensioned sketch or tell us what you need. Our engineering office reviews it, asks whatever it needs to and, if necessary, helps you define the part: advice is part of the service, for metalworkers and small workshops too.

06Process, lead times and delivery

What happens after I send my request?

  • Enquiry: you send the drawing, material, thickness, quantity and deadline
  • Review by our engineering office and manufacturing plan
  • Quote and confirmation, with alternatives where there are any
  • Manufacturing within the same plant
  • Inspection, packing and delivery

What lead time does a rolling and curving order have?

It depends on the part, the quantity and the other processes involved. In the quote request you can choose a 24/48 h urgent service (with a surcharge), about one week, a flexible deadline or a specific date, and we confirm it with the quote.

Do you have to wait for material before starting?

For many routine orders, no. We keep sheet and tube in permanent stock, so manufacturing can start without waiting for material.

Can you deliver the parts to our factory?

Yes, with our own fleet. We prepare the load and deliver the parts palletised and protected to the agreed point. We usually serve the provinces of Tarragona and Barcelona, and look at other destinations case by case.

07Sectors and experience

Why choose Catà Germans for rolling and curving?

We are a family company founded in 1958, with more than 65 years in industrial subcontracting of metal parts.

  • Every process under one roof: cutting, forming, machining, welding and finishing
  • Our own engineering office, which reviews the drawing before manufacturing
  • Direct contact with the people who make the part
  • One order and one point of contact, right through to delivery

08Quotes, files and orders

Which file formats do you accept?

We accept PDF, DXF, DWG, STEP/STP, STL, IGS/IGES and also PNG or JPG images. If you do not have a final drawing yet, send us a dimensioned sketch and we will review it all the same.

Do you make one-off parts or only production runs?

We handle one-off parts and prototypes as well as small, medium and large batches and repeat production. You can specify this in the quote request.

How quickly do you reply to an enquiry?

We send the technical response as soon as possible once we have the drawing and the part details.

Do you offer painting, zinc plating or other surface finishes?

You can include them in the order. These finishes are carried out with specialist workshops we work with regularly, but we handle the coordination and the transport: you place a single order and receive the finished part.

Can I combine several processes in one part?

Yes — that is the normal way we work. A part can go through laser cutting, bending, welding and finishing inside the same plant, under a single order and a single point of contact.

Let's begin

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